Improvement in boring-machines



UNITED STATES PATENT OFFICE.

SAMUEL U. KING, OF WINDSOR, VT., ASSIGNOR TO THE LAMSON St GOODMANMANUFACTURING COMPANY, OF SIIELBURNE FALLS, MASS.

IMPROVEMENT IN BORING-MACHINES.

Specification forming part of Letters Patent No. 4*),9LL dated May 24,1864.

To all whom it may concern:

Be it known that I, SAMUEL U. KING, of Windsor, in the county of`Windsor and State of Vermont, have invented a new and Improved Boringand Drilling Machine; and I do hereby declare that the following is afull, clear, and exact description of the same, reference being had tothe accompanying drawings, making a part of this specification, inwhich- Figure l is a side sectional view of my invention, taken in theline x w, Fig. 2; Fig. 2, a front elevation of the same.

Similar letters of refe-rence indicate correspondin g parts in the twofigures.

This invention relates to a new and useful attachment for boring anddrilling machines,

such as are provided with a sliding frame for holding the auger or drillarbor.

The invention consists in the employment or use of an adjustable rackbar arranged in connection with the gearing, by which motion is impartedto the drill arbor in such ainanner that the sliding frame may, when ithas reached the lowest point of descent, or at any time when it isdesired to raise the auger or drill, be readily raised by throwing therackbar in contact with one of the wheels of the auger or drill drivinggear, and while said gear is being turned in the proper direction foroperating the auger or drill, the rack-bar being thrown out of gear whenit is desired to lower the sliding frame, by simply turning thedriving-shaft a short distance in a backward or reverse direction.

To enable those skilled in the art to fully understand and construct myinvention, I will proceed to describe it.

A represents a base-plate, to which two uprights, B B, are attached,said uprights being connected by a cross-bar, G, at their upper ends;and D is a sliding frame, which is.

tted to guide plates a a on the front side of the uprights B B, in sucha manner that it may slide freely up and down thereon.

E is an arbor, which is fitted vertically in the frame D, and isprovided with a socket, b, at its lower end to receive the auger ordrill, the latter being secured in the former by a set-screw, c. On theupper end of the arbor E there is fitted av bevel-wheel, F, into which abevel-wheel, G, gears, the latter being on a shaft, H, the bearings ofwhich are on the frame D. The shaft H has a crank, d, on each end of it.The bevel-wheelGhas, besides its bevel-teeth, teeth e, which areparallel with the shaft H, as shown clearly in Fig. 2.

The sliding frame D, with its auger or drill arbor E and driving shaftH, may be arranged in the same way as those ofthe ordinaryboring ordrilling machines, and therefore do not require a more minutedescription.

I represents a rack-bar, the lower part, f, of which has an obliqueposition relatively with its other part, as shown clearly in Fig.

l, and the upper part of said rack-bar has an oblong slot, J, made init, the lower end, g, of which is curved forward toward the slidingframe D. The lower oblique part, f, of the rack-bar I is fitted within aguide, h, attached to one of the uprights B, and a screw, i, passesthrough the slot J into a projection, j, attached to the same upright Bto which the guide It is attached. When the rack-bar I is elevated sothat the screw t' will be in the lower curved part, g', of the slot J,the rackbar I will be-out of gear withthe teeth c of the wheel G, asshown in black in Fig. l, and when said rack-bar is lowered by shovingforward the upper part of the rack-bar the latter will drop in gear withthe teeth c of wheel G, as shown in red outline in Fig. l. IVhen theauger or drill is at work, the rack-bar I is out of gear with the wheelG, and the sliding frame D settles or works down under its own gravityas the auger or drill progresses in its work of turning the shaft H. Atany time when it is desired to raise the auger or drill and frame D theoperator or attendant shoves forward the upper end of the rack-bar I, sothat the screw i will be out of the lower curved end, g, ofthe slot J,and the raclcbar immediately drops in gear with the teeth e of the wheelG, and by turning the shaft H in the saine direction that it was turnedin drilling the frame D will be elevated. The frame l) is retained in anelevated state by means of a catch, K, attached to the top of the frameD, and so constructed and arranged as to catch over the cross-bar C whenthe frame reaches its highest or culminating; point, and When the framereaches this pointl the rackbar I is thrown out of gear by turning theshaft H in a reverse direction, and the frame D when released from thecross-bar C admits of the anger or drill being again adjusted to itsWork. Thus by this simple arrangement the operation of the machine isgreatly facilitated.

Having thus described my invention, what I claim as new, and desire t0secure by Letters Patent, is

'lhe combination of the rack I, guide h, curved slot j, and stud i, whenapplied to a boring and drilling machine and operated as hereindescribed. v

SAMUEL U. KING. Witnesses:

CARLOS COOLIDGE, WILLIAM HARRIS.

